matlab help

I wrote this code and the result is some complex circles but I need to specify the intersection (solid colored) please help[code]function GG=gercirc()clc;x=[-4:0.1:4];y=[-4:0.1:4];[X,Y]=meshgrid(x,y);hold onaxis equalaxis([-1 5 -3 3])z1=zeros(1,2);z2=z1;z3=z1;z4=z1;z5=z1;Zm=z1;